CN107095712B

CN107095712B - Specimen bag fetching device with winding pull ring and use method thereof

Info

Publication number: CN107095712B
Application number: CN201710410236.6A
Authority: CN
Inventors: 朱莫恕
Original assignee: 5r Med Technology Chengdu Co ltd
Current assignee: 5r Med Technology Chengdu Co ltd
Priority date: 2017-06-03
Filing date: 2017-06-03
Publication date: 2023-05-26
Anticipated expiration: 2037-06-03
Also published as: CN107095712A

Abstract

The invention relates to a specimen bag fetching device with a winding pull ring and a use method thereof, comprising a specimen bag, a catheter assembly, a handle assembly penetrating through the catheter assembly and a stretching mechanism which is connected with the handle assembly and can stretch the specimen bag, wherein the specimen bag comprises a bag opening which can be opened and closed and a bag body which is formed by extending from the bag opening, and the bag opening comprises a surrounding tunnel and a binding wire penetrating through the tunnel; the distal end of the binding wire comprises a sliding joint, the distal end of the binding wire passes through the tunnel, the proximal end of the binding wire passes through the sliding joint to form a binding wire ring which is the same as the bag mouth, and the proximal end of the binding wire is connected with the pull ring; the pull ring comprises a pull ring body, the center of the pull ring body is provided with a through hole, the through hole can accommodate the fingers of a surgeon and rotate around the fingers, and the pull ring body further comprises a concave wire groove around the peripheral wall of the pull ring.

Description

Specimen bag fetching device with winding pull ring and use method thereof

Technical Field

The invention relates to a minimally invasive surgical instrument, in particular to a specimen bag structure.

Background

In minimally invasive surgery (especially hard endoscopic surgery), it is often necessary to remove internal tissue or diseased organs through a small incision in the patient's skin or through a puncture catheter. How to safely and conveniently take out tissues or lesion organs in a cavity is always a difficult problem which puzzles the minimally invasive surgery. Since the first clinical application of hard tube endoscopic surgery, various special specimen bags for endoscopic surgery are developed at home and abroad. Although the specimen bags differ in structure and manner of use, they can be generally divided into two categories: first, a single specimen bag. In US5037379, a single-side-opening strip specimen bag is disclosed, and in use, the specimen bag body is held by a grasper and then passed through a puncture catheter or small incision into a patient. The second type comprises a specimen bag, a catheter and a fetching device of a spreading mechanism. In US patent inventions of US5465731, US5480404 and US6383197, various sampling devices are disclosed, wherein a specimen bag is rolled up and stored in a catheter, and when in use, the sampling device enters a patient through a puncture cannula, and then pushes a spreading mechanism to push out the rolled specimen bag from the catheter, and the spreading mechanism spreads the specimen bag, so that the sampling device can be conveniently placed into tissues or lesion organs cut in an operation.

The ligature is usually made by the fine rule that material such as nylon of diameter about 0.5mm was made, to date, accomplishes tissue or pathological change organ cutting, usually first operation handle assembly will prop out the mechanism and take out through the puncture sleeve, then pulls the ligature and tightens up the ligature ring to draw in the sack of specimen bag. In the process, as the puncture sleeve inner diameter or the minimally invasive operation incision is smaller, when larger tissues or organs are resected, the specimen bag is subjected to large extrusion force, the binding wire is also subjected to large tightening force, when an operator tightens the binding wire by force, the finger part is subjected to large tightening force, the pressure applied to the contact position of the finger and the binding wire of a fine wire is large, the finger fatigue or the finger injury caused by tightening the binding wire is extremely easy, and the glove sleeved on the hand is possibly broken by the binding wire, so that the protection of the operator is possibly reduced, and germ infection is caused. Meanwhile, because the length of the binding wire pulled out of the body is long, the operator has to tighten the binding wire in a relay mode for many times or the arm is swung to the body to tighten the binding wire later, which is very time-consuming and inconvenient.

One of ordinary skill will readily recognize that increasing the diameter of the ligature or decreasing the tightening force on the finger by wearing a glove of increased thickness. However, when the specimen bag is used in the aforementioned retrieval device, increasing the diameter of the tie typically results in the specimen bag being unable to be received within or pushed out of the outer tube after being strapped with the tie due to the size limitations of the outer tube. Although the damage of the binding wire to the fingers can be reduced by increasing the thickness of the glove, the thickened glove can cause inflexibility and smoothness of the fingers during other operations of the minimally invasive surgery. So far, in clinical application, the situation that the finger of an operator is damaged or the glove is broken due to the fact that the specimen bag is tightly tied still occurs. The wire tightening device or the method with safety is safer and more convenient, which is beneficial to improving the safety of the minimally invasive surgery and pushing the minimally invasive surgery to develop more.

Disclosure of Invention

To solve one or more of the foregoing problems with the background art, the present invention discloses a specimen bag retrieval device with a coil pull ring, comprising a specimen bag, a catheter assembly and a handle assembly extending therethrough, and a spreader mechanism connected to the handle assembly for spreading the specimen bag, wherein: the specimen bag comprises a openable and furled bag opening and a bag body extending from the bag opening, wherein the bag opening comprises a surrounding tunnel and a binding wire penetrating through the tunnel. The distal end of the binding wire comprises a sliding joint, the distal end of the binding wire passes through the tunnel, the proximal end of the binding wire passes through the sliding joint to form a binding wire ring which is the same as the bag mouth, and the proximal end of the binding wire is connected with the pull ring. The specimen bag and the opening mechanism are arranged in the catheter assembly and can axially move relative to the catheter assembly; the specimen bag and the opening mechanism are pushed forward in the catheter assembly through the operation of the handle assembly, extend out of the catheter assembly and are opened by the opening mechanism; the opening mechanism is pulled out backwards along with the catheter assembly and separated from the specimen bag. The pull ring comprises a pull ring body, the center of the pull ring body is provided with a through hole, the through hole can accommodate the fingers of a surgeon and rotate around the fingers, and the pull ring body further comprises a concave wire groove around the peripheral wall of the pull ring.

In one implementation of the present invention, the catheter assembly includes a hollow catheter and a catheter proximal end extending from the hollow catheter proximal end, the catheter proximal end being provided with a second wire clip. The opening mechanism comprises an elastic body, a connecting shaft connected with the proximal end of the elastic body, an inner groove with an opening facing forward and a guide groove extending from the inner groove to the proximal end of the connecting shaft, and a first line clamp is arranged in the inner groove; the first line card opening and the second line card opening face the same direction as the inner groove opening. The proximal end of the binding wire is sequentially limited by a first wire clip and a second wire clip from the distal end to the proximal end.

In still another implementation scheme of the invention, a plurality of limit clamps extend inwards of the wire slot from two side walls of the wire slot, the extension length of the limit clamps exceeds the central position of the wire slot, and the limit clamps on the two side walls are arranged in a staggered mode.

In yet another embodiment of the present invention, the material of the pull ring body includes a silica gel material, a rubber material or a plastic material.

In yet another implementation of the present invention, wherein the catheter assembly comprises a hollow catheter, the ligature is threaded through the hollow catheter of the catheter assembly.

Another object of the present invention is to provide an assembling method for loading a specimen bag of a fetching device into a catheter assembly, wherein the assembling steps are as follows:

s1, preparing an assembled object taking device, wherein the bag opening of the specimen bag is propped up by an elastomer of a propping up mechanism, and the pull ring rolls redundant wires at the proximal end of the binding wire in the wire slot;

s2, an operator pulls the proximal end of the binding wire between the first line clamp and the second line clamp with fingers, and the pulled length of the proximal end of the binding wire is longer than the length of the perimeter of the opening of the specimen bag;

s3, rolling the bag body of the specimen bag into a cylinder shape and tightly attaching the cylinder body to the tunnel;

s4, pulling the finger ring of the handle assembly along the axial direction of the hollow catheter of the catheter assembly to move from the distal end to the proximal end, wherein the distal end of the handle assembly drives the specimen bag curled into a cylinder shape and tightly attached to the tunnel to retract to the catheter;

and S5, rotating the pull ring, tightening redundant wires at the proximal end of the tying wire, tensioning the proximal end of the tying wire along the guide groove and the outer wall of the hollow catheter, and aligning and fixing the pull ring and the hole of the finger ring.

Still another object of the present invention is to provide a method for using an object taking apparatus, wherein the steps of using are as follows:

the preparation stage is that the fetching device in the retraction state is inserted into the patient body through the puncture cannula and extends to the target area.

S2, in the unfolding stage of the fetching mechanism, the operating handle assembly controls the proximal end to move axially relative to the catheter assembly from the distal end until the opening mechanism and the specimen bag are completely exposed out of the catheter assembly, and the elastic body is automatically restored, so that the specimen bag is opened;

s3, in the stage of cutting off the specimen, positioning the object taking device in the unfolded state under the position of the pathological tissues or organs under the cooperation of an endoscope and the like, cutting off the pathological tissues or organs through an operation scissors and dropping the pathological tissues or organs into a specimen bag;

s4, in the sample taking-out stage, the operation handle assembly takes out the spreading mechanism through the puncture sleeve, and simultaneously pulls the pull ring outwards in the longitudinal direction to drive the proximal end of the binding wire to separate from the first and second line cards, so that the sliding joint slides and contracts the binding wire ring, and the bag mouth of the sample bag is folded; then the proximal end of the binding wire is curled and approaches the proximal end of the puncture cannula by rotating the pull ring, and the catheter assembly is taken out of the puncture cannula; the surgeon then grasps the cannula with one hand and tightens the pull ring with the other hand to remove the contained specimen longitudinally outwardly through the percutaneous incision.

Drawings

For a fuller understanding of the nature of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a perspective view of a first embodiment of the retrieval mechanism of the present invention in a retracted state;

FIG. 2 is a perspective view of the retrieval mechanism of FIG. 1 in an expanded state;

FIG. 3 is an exploded view of the extraction mechanism of FIG. 2;

FIG. 4 is a simulated view of the cinching pocket of the retrieval mechanism of FIG. 2;

FIG. 5 is a simulated view of the retrieval mechanism of FIG. 4 after removal of the handle assembly and the spreader mechanism;

FIG. 6 is a perspective view of the tab of FIG. 1;

FIG. 7 is a further tab schematic;

FIG. 8 is a perspective view of a second embodiment of the retrieval mechanism of the present invention in an expanded state;

fig. 9 is an enlarged view of a portion of the first line card of fig. 8;

FIG. 10 is an enlarged view of a portion of the proximal end of the retrieval device of FIG. 8;

fig. 11 is an enlarged view of a portion of the second line card of fig. 10;

FIG. 12 is a perspective view of the tab of FIG. 8;

FIG. 13 is a further schematic perspective view of the tab of FIG. 12;

FIG. 14 is a cross-sectional view of the tab 14-14 of FIG. 12;

FIG. 15 is a schematic view of a specimen bag loading catheter assembly step 1 of the retrieval device;

FIG. 16 is a schematic view of a specimen bag loading catheter assembly step 2 of the retrieval device;

FIG. 17 is a schematic view of a specimen bag loading catheter assembly step 3 of the retrieval device;

FIG. 18 is a schematic view of the specimen bag loading catheter assembly step 4 of the retrieval device;

FIG. 19 is a schematic view of a specimen bag insertion catheter assembly step 5 of the retrieval device;

FIG. 20 is a schematic view of the cinching pocket of the retrieval mechanism of FIG. 19;

FIG. 21 is a schematic view of the tab curl tie of FIG. 20;

FIG. 22 is a schematic view of the retrieval catheter assembly of the retrieval mechanism of FIG. 21;

FIG. 23 is a schematic view of the removal of a specimen by the removal mechanism of FIG. 22;

the same reference numbers will be used throughout the drawings to refer to identical or similar parts or components.

Detailed Description

Embodiments of the present invention are disclosed herein, however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, the disclosure herein is not to be interpreted as limiting, but merely as a basis for the claims and as a basis for teaching one skilled in the art how to employ the invention.

Referring to fig. 1-3, for convenience of description, the side closer to the operator is defined as the proximal end, the side farther from the operator is defined as the distal end, the central axis of the article handling apparatus 10 is defined as the longitudinal axis 1000, the direction generally parallel to the longitudinal axis is referred to as the axial direction, and the direction generally perpendicular to the longitudinal axis is referred to as the lateral direction. The outward direction of the mouth of the specimen bag 101 is defined as the forward direction, and the reverse direction is defined as the reverse direction.

Fig. 1-7 depict in detail the structural composition of a first embodiment of an extraction instrument 10 of the present invention. 1-3, the retrieval device 10 includes, in order from a distal end to a proximal end, a specimen bag 101, a deployment mechanism 102, a catheter assembly 103, a handle assembly 104, a ligature 105, and a pull ring 106. Catheter assembly 103 includes a hollow catheter 133 and catheter handle portion 131 and catheter handle portion 132 fixedly joined thereto. The outer diameter of the hollow catheter 133 varies from one clinical application to another, and the common diameters are roughly divided into 5mm,8mm,10mm,12mm and 15mm. The handle assembly 104 includes a finger ring 142 and a hollow drive rod 141 connected in sequence from a proximal end to a distal end, the drive rod 141 being positioned within the hollow catheter 133 and axially movable relative to the hollow catheter 133 to move the spreader mechanism 102 and the specimen bag 101 between a retracted state (fig. 1) and an extended state (fig. 2).

As shown in fig. 3, the distracting mechanism 102 comprises an elastic body 121 and a connecting shaft 122 connected to the proximal end of the elastic body 121, the elastic body 121 comprises two

elastic bands

123 and 124 which are substantially flexible or elastic, and the

elastic bands

123 and 124 are substantially identical in shape and symmetrically disposed along the connecting shaft 122. The

elastic bands

123 and 124 include a linear segment 123b and a linear segment 124b at the proximal end and an elastic segment 123a and an elastic segment 124a at the distal end, where the

elastic segments

123a and 124a have flexibility and shape memory, and are deformable and stored by an external force and can be automatically opened when the external force is removed. The proximal end of the straight line segment 123b is provided with a mounting hole 123c, the proximal end of the straight line segment 124b is provided with a mounting hole 124c, the connecting shaft 122 is provided with a shaft hole 122a corresponding to the mounting hole 124c and the mounting hole 123c, and the elastic band 123 and the elastic band 124 are riveted on the connecting shaft 122 through rivets 125. The proximal end of the connecting shaft 122 is inserted into the distal end of the driving rod 141, and is fixedly connected by glue, screw connection, welding, or the like. It will be appreciated by those skilled in the art that the elastic body 121 and the connecting shaft 122 may be welded, pinned or directly connected to the distal end of the driving rod 141.

The specimen bag 101 includes an openable and closable pouch opening 111, and a closed pouch 112 extending from the pouch opening 201. The mouth 111 includes a tunnel 113 surrounding the mouth, the tunnel 113 being configured to receive the deployment mechanism 102 and the tie 105. Referring to fig. 2-3, the distal end of the tie 105 includes a sliding knot 151, the distal end of the tie 105 is passed through the tunnel 113 and the proximal end 153 thereof is passed through the sliding knot 151 to form a tie ring 152 having substantially the same size as the mouth of the bag, the proximal end 153 being connected to the pull ring 106. The elastic body 121 is inserted into the tunnel 113. After the extractor 10 is assembled (see fig. 2), the specimen bag 101 is typically wound around the elastic body 121 and received in the hollow tube 133 (see fig. 1). Various ways of winding and receiving the retrieval device are disclosed in U.S. patent 8986321, and other retrieval devices are also disclosed in specific use, with minor adaptations of the same by one of ordinary skill in the art as applicable to the present invention.

In this embodiment, the elastic body 121 has a shape memory function, and can be automatically and conveniently unfolded in a winding and receiving manner of the fetching device 10. The operator pushes the driving lever 141 to push the specimen bag 101 and the expanding mechanism 102 in the retracted state (fig. 1) out of the hollow catheter 133, and the elastic body 121 has a shape memory function to automatically restore, thereby automatically opening the specimen bag 101 (fig. 2). It will be appreciated by those skilled in the art that the

elastic bands

123 and 124 of the elastic body 121 may also be configured as a linkage mechanism to achieve the distraction. In addition to the description of the distractor 102, catheter assembly 103, and handle assembly 104 of a typical retrieval device 10, it will be appreciated by those skilled in the art that alternative combinations of catheter assembly 103 and handle assembly 104 are contemplated as within the scope of the present invention, such as by U.S. patent nos. 5465731, 6383197, 8721658, etc. and the distractor 102 of the present embodiment.

Referring to fig. 6, the tab 106 includes a tab body 161 having a through hole 164 in the center, the through hole 164 being adapted to receive a surgeon's finger and to be easily rotatable about the finger, in this embodiment, the through hole 164 has a diameter of about 20-25mm. The tab body 161 further includes a concave line groove 162 formed around the outer peripheral wall of the tab, and a line hole 163 penetrating the line groove 162 in the direction of the through hole 164, and the cross section of the line groove 162 includes a U-shape, a polygonal shape or an inverted trapezoid shape. As shown in fig. 7, the ring periphery of the ring-pull body 161 and two side walls of the slot 162 extend smoothly and form two convex cam surfaces 160. To facilitate entry of the tie 105 into the wire chase 162, the cam surface 160 includes, but is not limited to, a dome surface, a trapezoid surface, and the like. The tab 106 is made of a flexible or semi-rigid material including, but not limited to, a silicone material, a rubber material, a plastic material, or the like.

Alternatively, the proximal end 153 of the wire tie 105 is passed through the catheter assembly 103 and pulled proximally from the hollow catheter 133 and attached to the pull ring 106 in a manner that includes a variety of known prior art means, such as tying, bonding, and the like. In this embodiment, the tie 105 is secured to the tab 106 by threading the tie 105 through the tie hole 163.

Referring to fig. 7, there is depicted a further structural composition of the tab 106a, the tab 106a changing the tie wire aperture 163 to a tie wire slot 163a based on the tab 106, the tie wire slot 163a extending from the cam surface 160 along the tab body 161 having a barb shape that primarily serves to initially secure the tie wire slot tie proximal end 153. It will be appreciated by those skilled in the art that the tie bar grooves 163a may also be approximately L-shaped or U-shaped tie bar grooves. The proximal end 153 of the binding wire is provided with a wire loop in advance, the wire loop is sleeved in the wire tying groove 163a and is initially fixed, and then the binding wire 105 is fixed on the pull ring 106 by utilizing the mode that the proximal end 153 of the binding wire is accommodated and rolled, so that the pull ring 106a can be conveniently wound and fixed or separated from the binding wire 105.

The relevant operation of the clinical application of the retrieval mechanism 10 may be generally divided into the following stages:

the first stage: and (5) a preparation stage. The retrieval device in the retracted state is inserted into the patient via the puncture cannula and extends to the target area (fig. 1). And a second stage: and a picking mechanism unfolding stage. The operation handle assembly 104 controls the driving rod 141 to axially move relative to the hollow catheter 133 from the proximal end to the distal end until the opening mechanism 102 and the specimen bag 101 are completely exposed out of the hollow catheter 133, and the elastic body 121 has a shape memory function to automatically restore, thereby automatically opening the specimen bag 101 (fig. 2). And a third stage: and cutting off the specimen. The object taking device 10 in the unfolded state is positioned under the position of the lesion tissue or organ under the cooperation of an endoscope and the like, and the lesion tissue or organ is sheared off by a surgical scissors and falls into the specimen bag 101. In the first to third stages of the operation described above, the tab 106 receives the exposed proximal end 153 of the wire harness 105 into the wire groove 162, the tab 106 may be overlapped and secured with the finger ring 142, and the tab 106 may be operated together with the finger ring 142 when the operator operates the handle assembly 104 with his fingers. Because the pull ring 106 winds and stores the proximal end 153 of the binding wire exposed out of the catheter assembly 103, the proximal end 153 of the binding wire exposed out of the catheter assembly 103 can be prevented from interfering with the operation, the risk of the operation is avoided, and the operation is convenient. Referring to fig. 4-6, a fourth stage, a specimen retrieval stage. Specifically, the handle assembly 104 is operated to withdraw the opening mechanism 102 through the puncture cannula, and simultaneously pull the pull ring 106 to drive the proximal end 153 of the tying wire 105, so that the sliding joint 151 slides and contracts the tying wire ring 152, thereby closing the mouth 111 of the specimen bag 101; then, the surgeon tightens the pull ring 106 to drive the tying wire 105 to take out the specimen bag 101 and the specimens contained therein through the puncture cannula or the percutaneous incision; in this process, the catheter assembly 103 operates with the pull ring 106, as the proximal end 153 of the binding wire extends through the hollow catheter 133 of the catheter assembly 103. Although the various extraction devices are different in structure and application, their functions and main steps are substantially the same. The method of clinical application of the retrieval device 10 of the present invention may also be understood with reference to the relevant description in US5465731 to better understand the use of the present invention.

Referring to fig. 4-5 and 7, an alternative solution is to operate the handle assembly 104 to withdraw the deployment mechanism 102 through the puncture cannula, and simultaneously pull the pull tab 106a to drive the proximal end 153 of the tie wire 105 such that the sliding joint 151 slides and contracts the tie wire loop 152, thereby collapsing the mouth 111 of the specimen bag 101; then the proximal end 153 of the binding wire is released and the binding groove 163a of the pull ring 106a is sleeved on, the pull ring 106a is separated from the binding wire 105, and then the catheter assembly 103 is taken out; then, the wire loop of the proximal end 153 of the tying wire is sleeved on the tying wire groove 163a, and the proximal end 153 of the tying wire is curled into the wire groove 162, and the surgeon pulls the pull ring 106 to drive the tying wire 105 to take out the specimen bag 101 and the specimen contained therein through the puncture cannula or through the percutaneous incision. In this process, the binding wire 105 needs to be separated and re-fixed, however, since the catheter assembly 103 is taken out, the proximal end 153 of the pull ring 106a is curled and pulled to be closer to the proximal end of the puncture sleeve 3000, the length of the proximal end 153 of the binding wire is effectively shortened, the pull ring 106a is held by hand to be closely attached to the proximal end of the puncture sleeve 3000 to pull out the specimen bag 101 and the specimen contained therein, the pulling direction can be better mastered, and the operation is more labor-saving.

It will be appreciated by those skilled in the art that in the prior art that has been disclosed, the surgeon typically pulls the tie wire directly with a finger or with a finger with a glove to gather the specimen bag and remove the tissue or organ. Because the puncture cannula has smaller inner diameter or minimally invasive operation incision, when larger tissues or organs are resected, the specimen bag is subjected to large extrusion force, the ligature 105 is also subjected to large tightening force, the tightening force applied to the finger is also very large, at the moment, the pressure applied to the contact position of the finger and the ligature is very large, the finger which is used for tightening the ligature is tired or is injured by the tightening, the glove sleeved on the hand is possibly broken by the ligature, so that the protection of a surgeon can be reduced, germ infection is caused, and particularly, the ligature can be inevitably stained with body fluid or other liquid of a patient in the operation process to cause the ligature to slide in the finger or the glove, so that the operation is influenced.

According to the winding pull ring 106 disclosed by the invention, on one hand, the pressure on fingers can be effectively reduced through the hole wall of the through hole 164 of the pull ring 106, the damage to the fingers or the glove is avoided, and the protection capability of an operator is enhanced. On the other hand, after the proximal end 153 of the ligature 105 is curled by the pull ring 106, the distance between the pull ring 106 and the puncture cannula or skin incision is shortened, the operator pulls the pull ring 106 from the position close to the puncture cannula inner diameter or skin incision to the distal end along the longitudinal direction, and the proximal end 153 of the ligature is stressed in the same direction as the puncture cannula inner diameter or skin incision and is not contacted with the puncture cannula inner diameter or skin incision, so that the ligature 105 is only stressed by the longitudinal pulling force and is not stressed by the transverse component force, the tightening of the bag opening 111 and the pulling of tissues or organs are obviously more labor-saving, and abrasion, particularly damage to the puncture cannula inner diameter and skin incision are avoided.

Fig. 8-23 depict in detail the structural composition of the retrieval instrument 20 and its application in accordance with a second embodiment of the present invention. Fig. 8-15 depict in detail the structural composition of a second embodiment of the retrieval mechanism 20 of the present invention. The structure of the fetching device 20 is substantially the same as that of the fetching device 10, and the difference is that the tying wire 105 is inserted through a slot of the outer wall of the hollow catheter 233 of the catheter assembly 203, so that the catheter assembly 203 can be directly taken out in the fetching process, the length of the proximal end 153 of the tying wire can be further shortened, and an alternative technical scheme is provided for the pull ring.

As shown in fig. 8 and 10-11, the retrieval mechanism 20 includes, in order from the distal end to the proximal end, a specimen bag 101, a deployment mechanism 202, a catheter assembly 203, a handle assembly 104, a ligature 105, and a pull ring 206. Catheter assembly 203 includes a hollow catheter 233 and a catheter proximal end 234 formed by the proximal extension of hollow catheter 233, as well as a catheter handle portion 231 and a catheter handle portion 232 fixedly joined with catheter proximal end 234. The catheter proximal end 234 has a hollow diameter greater than the hollow catheter 233 diameter and guides the handle assembly 104 inserted therein, and the catheter handle portion 231 and the catheter handle portion 232 are positioned on opposite sides of the catheter proximal end 234 and perpendicular to the forward direction. The proximal end 234 of the catheter is provided with a second line clamp 238 with a bayonet facing forward, the second line clamp 238 is formed by extending two second elastic arms 238a (238 c) forward from the proximal end 234 of the catheter and by extending two second cam surfaces 238b (238 d) with circular arc surfaces from the second elastic arms 238a (238 c), the distance between the two second cam surfaces 238b (238 d) is smaller than the wire tying diameter, and the distance between the second elastic arms 238a (238 c) is larger than the wire tying diameter, so that the proximal end 153 of the wire tying can be clamped between the second elastic arms 238a (238 c) along the second cam surfaces 238b (238 d) and is limited by the second cam surfaces 238b (238 d). The second wire clip 238 is secured to the catheter proximal end 234 by adhesive, welding, or the like. The hollow catheter 233 has different outer diameters for different clinical applications, and common diameters are roughly divided into 5mm,8mm,10mm,12mm and 15mm. The handle assembly 104 includes a finger ring 142 and a hollow drive rod 141 connected in sequence from a proximal end to a distal end, the drive rod 141 being positioned within the hollow catheter 233 and axially movable relative to the hollow catheter 233 to move the spreader mechanism 202 and the specimen bag 101 between a retracted state (fig. 20) and an extended state (fig. 8).

As shown in fig. 8-9, the distracting mechanism 202 includes an elastic body 121 (123) and a connecting shaft 222 connected to the proximal end of the elastic body 121 (123). The tunnel 113 of the specimen bag 101 is used for accommodating the elastic body 121 (123) of the opening mechanism 202 and the binding wire 105. The distal end of the connecting shaft 222 further includes an inner recess 225 that opens in a forward direction and a guide slot 224 that extends proximally from the inner recess 225. A first line card 223 is arranged in the inner groove 225; the first line card 223 has an opening facing the same direction as the opening of the inner groove. The first line card 223 includes two first elastic arms 223a (223 c) and a first cam surface 223b (223 d) formed by forward extending the first elastic arms 223a (223 c) and having an arc surface on one side, the first cam surface 223b and the first cam surface 223d are substantially mirror symmetry, the distance between the first cam surfaces 223b and 223d is smaller than the wire binding diameter, and the distance between the first elastic arms 223a and 223c is larger than the wire binding diameter. The proximal end 153 of the binding wire may be snapped between the first resilient arms 223a and 223c along the first cam surface 223b (223 d) and defined by the first cam surface 223b (223 d). The proximal end of the connecting shaft 222 is inserted into the distal end of the driving rod 141, and is fixedly connected by glue, screw connection or welding. It will be appreciated by those skilled in the art that the elastic body 121 and the connecting shaft 222 may be welded, pinned or directly connected to the distal end of the driving rod 141.

Referring to fig. 12-14, the tab 206 includes a tab body 261 having a central through hole 264, the through hole 264 being adapted to receive a surgeon's finger and to be easily rotatable about the finger, in this embodiment, the through hole 264 has a diameter of about 20-25mm. The tab body 261 further includes a U-shaped groove 262 recessed around the tab peripheral wall, and a tie hole 263 penetrating the groove 262 in the direction of the through hole 264. As shown in fig. 13, the ring-shaped periphery of the pull ring 261 and two side walls of the wire slot 262 extend smoothly and form two convex cam surfaces 260. To facilitate entry of the tie 105 into the wire chase 262, the cam surface 260 includes, but is not limited to, an arcuate surface, a trapezoidal surface, and the like. As shown in fig. 13-14, the side walls on two sides of the U-shaped line groove 262 extend into the line groove 262 along the direction of the center line of the through hole 264 respectively to form a plurality of limit clips 265 (266), the extending length of the limit clips 265 (266) exceeds the center position of the U-shaped line groove 262 of the line groove 262, and the limit clips 265 and the limit clips 266 are staggered. In this embodiment, the number of the limiting cards 265 (266) is 4, and the limiting cards are uniformly distributed along the circumference of the side walls at both sides of the line groove 262. The stop catch 265 (266) may limit the crimped wire to prevent its rebound from unwinding.

15-19, the process of changing the retrieval mechanism 20 from the initial assembled state to the retracted state is depicted. S1, as shown in FIG. 15, the object taking device 20 (equivalent to an unfolding state) ready to be assembled is provided, at the moment, the bag mouth 101 of the specimen bag 101 is unfolded by an elastic body 121 (123) of an unfolding mechanism 202, the binding proximal end 153 is sequentially limited from the distal end to the proximal end by a first 223 (238) and is connected with a pull ring 106, and the pull ring 106 bends redundant wires of the binding proximal end 153 in a wire groove 262;

s2, as shown in FIG. 16, an operator pulls the proximal end 153 of the binding wire between the first and second line cards 223 (238) with a finger, and the length of the pulled proximal end 153 is longer than the perimeter of the mouth 101 of the specimen bag 101;

s3, as shown in FIG. 17, the bag body 112 of the specimen bag 101 is curled into a cylinder shape and is tightly attached to the tunnel 113;

s4, as shown in FIG. 18, the finger ring 142 of the handle assembly 104 is pulled axially along the hollow catheter 233 of the catheter assembly 203, and the distal end of the handle assembly 104 drives the specimen bag curled into a cylinder shape and tightly attached to the tunnel 113 to retract into the catheter 133.

S5, as shown in FIG. 19, the pull ring 206 is rotated to tighten the excess wire at the proximal end 153 of the binding wire, the proximal end 153 of the binding wire is pulled tightly along the guide slot 224 and the outer wall of the hollow catheter 233, and the pull ring 206 is aligned and fixed with the hole of the finger ring 142.

The operation of the retrieval mechanism 20 in a clinical application is described in detail with reference to fig. 20-23. The first to third phases in the related operations of the clinical application in this embodiment are substantially the same as those of the first embodiment, and the main difference is the fourth phase, i.e., the operation procedure of the specimen retrieval phase. In the first embodiment, since the proximal tie wire end 153 is inserted into the hollow catheter 133 of the catheter assembly 103, either the pull ring 106 and the catheter assembly 103 need to be coupled together to the cannula assembly to remove the specimen bag 101, or the proximal tie wire end 153 needs to be uncoupled from the tether slot 163a of the pull ring 106a, and after removal of the catheter assembly 103, the proximal tie wire end 153 is then threaded into the tether slot 163a and crimped and coupled to the cannula assembly to remove the specimen bag 101. Referring to fig. 20-23, in this embodiment, the handle assembly 104 is operated to withdraw the opening mechanism 102 through the puncture cannula, and simultaneously pull the pull ring 206 longitudinally outwardly to bring the proximal end 153 of the tie wire 105 from the second, first wire clip 238 (223) such that the sliding joint 151 slides and contracts the tie wire loop 152, thereby collapsing the mouth 111 of the specimen bag 101; the proximal end 153 of the binding wire is then crimped and brought into proximity with the proximal end of the penetration sleeve 3000 by rotating the pull ring 206 while the catheter assembly 203 is removed from the penetration sleeve; the surgeon then grasps the penetration sleeve 3000 with one hand and tightens the pull ring 106 with the other hand to withdraw the contained specimen longitudinally outward through the percutaneous incision.

In this embodiment, since the proximal end 153 of the binding wire is defined by the first and second wire clips 223 (238) on the outer wall surface of the hollow catheter 233, when the handle assembly 104 and the opening mechanism 202 are removed, the pull ring 206 is pulled in the forward direction, and as the handle assembly 104 and the opening mechanism 202 move together in the longitudinal direction from the distal end to the proximal end, the proximal end 153 of the binding wire is separated from the second and first wire clips 238 (223), and then the catheter assembly 203 is removed from the sleeve assembly, the whole process does not need to be untwisted from the pull ring 206, which is more convenient and saves the operation time compared with the first embodiment. In addition, in this embodiment, the limiting card 265 (266) can limit the curled binding wire, so that the rebound and loosening of the binding wire can be effectively prevented. More importantly, the process of untangling the proximal end 153 of the binding wire from the pull ring 206 and connecting and fixing the proximal end again for wire coiling is avoided, so that the operation steps of the operation are simplified, and the operation time is saved.

In the prior art disclosed, US5465731 (patent 201410858206.8 to china) discloses a mode of connecting a pull ring at the proximal end of a tie, which can avoid the aforementioned damage to fingers or gloves to some extent when the specimen bag mouth is tightened. It should be understood by those skilled in the art that, since the pull ring does not have the function of accommodating the binding wire, when the surgeon tightens the opening of the bag and pulls out tissues or organs, a large amount of binding wire which has been pulled out is outside the apparatus, the finger needs to be held by the finger to keep away from the puncture cannula or the skin wound position to tighten the opening of the specimen bag, at this time, after the surgeon pulls the arm of the pull ring to get around, the finger holding the pull ring is in a vision blind area and is not easy to use, the surgeon cannot accurately control the direction of the binding wire, which is very easy to cause the binding wire to be subjected to oblique pulling force, so that the binding wire generates transverse component force, at this time, the binding wire obviously causes abrasion to the inside diameter of the puncture cannula, particularly skin wound, and meanwhile, the operation of the finger holding the puncture cannula is seriously affected. The pull tab 206 of the present invention not only has a crimped storage tie but also prevents its rebound from unwinding; more importantly, because the pull ring 206 curls the proximal end 153 of the binding wire and is near or in close proximity to the proximal end of the penetration cannula, the distance between the pull ring 206 and the penetration cannula or skin incision is greatly shortened; when the bag mouth is tightened and the specimen bag is taken out, the operator pulls the pull ring 206 in the longitudinal direction from the position close to the inner diameter of the puncture cannula or the skin wound to the distal direction, and the proximal end 153 of the tying wire is stressed in the direction basically consistent with the inner diameter of the puncture cannula or the skin wound and is not contacted with the inner diameter of the puncture cannula or the skin wound, so that the tying wire 105 is only stressed in the longitudinal direction and is not stressed in the transverse component force, the bag mouth 111 is obviously tightened and the tissue or the organ is pulled out more labor-saving, the inner diameter of the puncture cannula is not abraded, and the skin wound is not damaged. Meanwhile, because the surgeon holds the puncture sleeve 3000 with one hand in the same visible region and tightens the pull ring 106 with the other hand and clings to the proximal end of the puncture sleeve 3000, the direction and force of the two hands can be accurately controlled, and the contained specimen can be easily taken out through the skin incision.

Many different embodiments and examples of the invention have been shown and described. One of ordinary skill in the art will be able to make adaptations to the method and apparatus by appropriate modifications without departing from the scope of the invention. Such as simple adaptations using the line cards disclosed in other inventions, or by using different processes, such as using different combinations of shapes, locations or numbers of line cards. Several modifications have been mentioned, and other modifications are conceivable to the person skilled in the art. The scope of the present invention should therefore be determined with reference to the appended claims, rather than with reference to the structures, materials, or acts illustrated and described in the specification and drawings.

Claims

1. The utility model provides a take-up apparatus for specimen bag with winding pull ring, contains specimen bag, pipe assembly and runs through its handle assembly, and with the mechanism that struts of specimen bag that handle assembly is connected, its characterized in that:

the specimen bag comprises a bag opening capable of being opened and folded and a bag body formed by extending from the bag opening, wherein the bag opening comprises a surrounding tunnel and a binding wire penetrating through the tunnel;

the distal end of the binding wire comprises a sliding joint, the distal end of the binding wire passes through the tunnel, the proximal end of the binding wire passes through the sliding joint to form a binding wire ring which is the same as the bag mouth, and the proximal end of the binding wire is connected with the pull ring;

the specimen bag and the opening mechanism are arranged in the catheter assembly and can axially move relative to the catheter assembly; the specimen bag and the opening mechanism are pushed forward in the catheter assembly through the operation of the handle assembly, extend out of the catheter assembly and are opened by the opening mechanism; the opening mechanism is pulled out backwards along with the catheter assembly and separated from the specimen bag;

the pull ring comprises a pull ring body with a through hole in the center, the through hole can accommodate the fingers of an operator and rotate around the fingers, and the pull ring body further comprises an inner concave slot around the peripheral wall of the pull ring;

the catheter assembly comprises a hollow catheter and a catheter proximal end formed by extending the proximal end of the hollow catheter, and a second line clip is arranged at the catheter proximal end;

the opening mechanism comprises an elastic body and a connecting shaft connected with the proximal end of the elastic body, the distal end of the connecting shaft further comprises an inner groove with an opening facing forward, and a first line clip is arranged in the inner groove; the first line clamp opening and the second line clamp opening face the same direction as the inner groove opening;

the wire tying proximal end is sequentially limited by the first wire clip and the second wire clip from the distal end to the proximal end, and an operator can pull the wire tying proximal end between the first wire clip and the second wire clip by fingers.

2. The retrieval device of claim 1, wherein: the connecting shaft further includes a guide slot extending from the inner recess toward the proximal end of the connecting shaft.

3. The retrieval device of claim 1, wherein: the side walls on two sides of the wire slot extend to the inner side of the wire slot to form a plurality of limit clamps, the extending length of the limit clamps exceeds the center position of the wire slot, and the limit clamps on the side walls on two sides are arranged in a staggered mode.

4. The retrieval device of claim 1, wherein: the pull ring body is made of a silica gel material, a rubber material or a plastic material.

5. The retrieval device of claim 1, wherein: the catheter assembly comprises a hollow catheter, and the binding wire penetrates through the hollow catheter of the catheter assembly.

6. A method of assembling a specimen bag loading catheter assembly of an access apparatus according to claim 2, wherein the assembling steps are as follows:

and S5, rotating the pull ring, tightening redundant wires at the proximal end of the binding wire, limiting the proximal end of the binding wire by the first wire clip and the second wire clip along the guide groove and the outer wall of the hollow catheter, and aligning and fixing the pull ring and the holes of the finger ring.